I think we'll be seeing the Goseiger suits with the Gokaiger anniversary aspect. This should be an interesting series.
Technically, Goseiger's "Tensou Cards" can actually allow them to pull off the anniversary concept for Power Rangers instead of the Gokaiger's "Ranger Keys."
People tend to forget that before Goseiger debuted, Goseiger was originally rumored to borrow the concept of Kamen Rider Decade by utilizing the Tensou cards to transform into "any previous Sentai team."
The actual result was.........Goseiger only borrowed the "card concept" of Decade, while the "changing into previous heroes concept" was transferred over to Gokaiger instead with the Ranger Keys.
If the Saban Crew is going to be really creative this time around by merging the Gokaiger aspects into a Goseiger adaptation, they better realize that the "Tensou Cards" aka Sentai Dice-O trading cards already possess the template to pull this off.
With that being said.........I'm not very optimistic that the MegaForce production crew will be able to pull this off in a unique way. Good luck to them