So, people are saying the 11 great powers they mentioned obtaining come from the scene in the movie where past heroes give them a pep talk (thereby acknowledging the Gokaiger's worthiness?). That would mean Goranger, JAKQ, Denjiman, Goggle V, Dynaman, Bioman, Turboranger, Dairanger, Boukenger, and Go-onger, in addition to Goseiger.
If this is the case...pretty friggin' weak, man. While I expected some shows to get the short end like this (Denjiman and Goggle V, for example, since their Red actors no longer act and/or weren't even the most popular member of the team), I didn't think fan-favorite Reds like Red One, Red Turbo, Ryuuranger and Bouken Red would get so ripped off. (Unless they have plans for some of these characters to return later in the series to lend a hand.)
So, this leaves powers from Battle Fever J, Sunvulcan, Changeman, Flashman, Maskman, Liveman, Fiveman, Jetman, Kakuranger, Ohranger, Megaranger, Gingaman, GoGoFive, and Hurricaneger to be obtained.