The following is also hypothetical.
For the 35th anniversary of Super Sentai, there was a game called Super Sentai Battle Ranger Cross that went along with the series Pirate Sentai Gokaiger. It is for the Wii. The main team was the Gokaiger but eventually you could gain the teams of Goseiger, Shinkenger, Go-Onger and Goranger---the first Super Sentai ever. I wonder if Saban Brands plans to do a game like this for the 20th Anniversary of Power Rangers.
The Super Sentai Battle Ranger Cross had graphics similar to the Dice-O game. For those not familiar with Super Sentai and Dice-O, the same graphics are used for the clips seen an Action Card Game card is scanned on your phone using the card scanner app.
Sixth Rangers like Go-On Gold, Go-On Silver, Shinken Gold and Gosei Knight also appear.
Disney attempted a game called Power Rangers Super Legends in 2007 that was multiplatform and had a handful of past teams. It pitted Rangers against Lord Zedd from the past who time traveled. In most games, there was Mighty Morphin, Lost Galaxy, Time Force, Wild Force, Ninja Storm, SPD and Operation Overdrive Rangers. But the down side was that in some versions, you couldn't play all the colors of the team. For example, Yellow and Blue Mighty Morphin Rangers could only be played on PS2 and PC and the Green Ranger in DS.
It was clear that Disney didn't want to spend a lot of money if on the Wii, you could only play 10 rangers, 26 on Playstation 2, 20 on PC, and 29 on DS. They did have past grunts like Stingwingers, Putties and such but sometimes the had generic villains exclusive to the game. I hope if Saban Brands make a game like this, it would be at least one of each team....
or at least follow the platform of the Gokaiger game and do five teams: Super Megaforce, Megaforce, Samurai, RPM, and MMPR or if Gokaiger suits are not used, Jungle Fury.
If they can't get all the villains or Megazords, at least every team's main five. If they can't do the sixth rangers, I'd be fine with that. It is interesting how Toei and Bandai did an arcade game with the Dice-O cards but Bandai and Saban Brands chose not to with the ACG cards. My dream game would include every team, every Ranger and hero and every main Megazord and at least every footsolider possible. Anyway, that is just a dream. I had one dream long ago of a game including every zord possible, just a Megazord vs Megazord game.