If you don't mind extending your search to lakes south of the border I have a few recommendations that have trophy potential.
1- Presa Calles Aguascalientes.- near the town of Aguascalientes in the state of Aguascalientes. This lake is at its peak, and is unique because of an abundance of aquatic grass.(many big bass lakes in Mexico have very little aquatic vegetation). Bass over 15 pounds have been caught in Calles this past year. Big bass are caught on almost any technique from punching mats, to cranking 10 XD,s. This lake gets mild to moderate fishing pressure, with a couple full time guides, but no lodges. It is close to the City of Aguascalientes, which has many quality hotels and a thriving tourist industry.
2- Presa Calderon Jalisco. - This lake is near the city of Guadalajara. It is a small clear lake with a restriction banning boats with motors. I'm not sure if electric motors are allowed. You have to drag your boat, or kayak a small distance to get to the lake. Being so close to such a large city the lake does get a fair amount of fishing pressure. Most people fish this lake from the shore. Many are not fishing for bass, but bass fishing there is getting more popular. There was a 17 pound bass caught there last year, and I wouldn't doubt if other truly huge bass have been caught. A common rumor is a diver speared a world record bass, and another rumor is another diver saw a bass he estimated was 25 pounds. Like most rumors of big bass in Mexico, I think tequila might have a big influence on the validity of the claims. Rumors aside, I am sure there is a chance at catching a bass over15 pounds, and numerous 12 pound bass are caught there each year.
3,- Presa Trigomil Jalisco- I have fished this lake a few times, and am impressed not only with the size and number of bass, but the amazing amount of forage available for the bass to gorge on. The biggest bass I personally know of being caught there, is 14.5 pounds but I am sure there have been larger ones landed. My PB from this lake is 9.5 pounds, but I saw many bass bigger than that on beds this spring. This is a larger lake that gets almost zero bass fishing pressure. On a busy weekend there will be one or two boats, and a half dozen shore anglers, in pursuit of bass. This is a deep high land Reservoir with many steep canyons and bluff walls. Primary food source for bass is Tilapia, but there are also bluegill, and freshwater lobsters for the bass to gain weight on. There are no lodges or guides fishing Trigomil. The owner of a lodge on Auguamilpa was going to start a lodge at this lake but decided against it because of its distance from any Airport. Guadalajara is 3 hours away, and Puerto Vallarta is a 4 hour drive. The road getting to the lake is rough, and can be washed out at times during the rainy season. There is a quality hotel in a town called Union de Tula about 30 minuets from the lake. There is a nice safe place to camp right at the launch and that is what I do when I fish this lake.
There is some commercial netting for Tilapia at this lake, but very little compared to other lakes half it's size. All the nests are well maintained, and I have yet to snag an old ghost net.
I had to pry information about this lake from a deck hand I hired, and it took me a long time to find the access road. The few people that fish the lake have tried to keep it a secret for a few years. Due to U tube the cat has been out of the bag for a year or two, so I don't mind sharing information about this amazing trophy bass fishery. This lake is probably the best chance of multiple DD digit catches in all of Mexico.
4.- Baccarac Sinaloa - Of course any recommendation for giant bass in Mexico would not be complete without mentioning this big bass lake. The lake record is over 19 pounds, and many people have caught 5 fish stringers over 45 pounds. There are a number of lodges with excellent guides operating on this lake from October until June. If you are on a due it yourself trip, don't rule out July though sept. This is the rainy season, but the bass are still willing to bite and you will have the lake to yourself.
Due to a drought Baccarac has appeared to be on the decline the past couple years, but I would not write it off yet. It still has an amazing bait population, and more quality size bass than any other lake in Mexico. It could be back at its peak for DD in a couple years or less. Even at less than its peak, there are an amazing amount of giant bass in this famous lake. The drought ended last July so the lake should be on the rebound by now. Bass Resource member AJ can attest to the big bass potential of Baccarac.
El Salto and Picachos get an honorable mention. They both can have giant bass, and the El Salto lake record is over 18 pounds. Both lakes have arguably been in decline for a few years as far as true giants go, but both lakes can still kick out DD bass at any time. Both have fantastic lodges, and guides and are probably the most popular lakes in Mexico to bass fish.
There are many other lakes in Mexico with giant bass potential, but these are the ones I know of with your best chance at catching a true monster. I have only been fortunate enough to fish a couple of these lakes myself. Much of the information I have mentioned is from talking with friends, and reading fishing reports. I didn't list my favorite lake Presa Pocho in Nyarite because of its small size and difficulty getting to. The biggest bass I know of caught in this lake was 16.5 pounds, and I know of one 14.5 pounds. This lake is not anywhere near what it once was, but still has potential for big bass. There are numerous other small unheard of lakes are spread throughout Mexico, with giant bass, as well as larger more known lakes that are better for numbers of quality bass rather than true giants.