Rocky would be using the Red Ranger powers. There were pictures of the filming going around, and they showed weapons like the Chrono Saber, the Drago Sword, and the Power Sword. Jason won't be involved. So it's Rocky. So I also think of it as making up for him being missing in "Forever Red".
It also looks like Tommy will be the Green Ranger again. It's the ranger form that JDF prefers, as he thinks it's where Tommy was the most interesting. So what JDF wants, JDF gets. That's why he used the Green Ranger powers in "Legendary Battle". In fact, here are some links to TokuChris' tweets on the matter, which also confirm what powers Tommy, Rocky, Kat, T.J., and Gia will be using.
https://mobile.twitter.com/TokuChris...542888961?s=20
mobile.twitter.com/TokuChris/status/1003511282106970112?s=20
So it looks like Trent will be involved after all, along with Antonio and Chase. So I guess we have our ten rangers, plus Tommy, who I guess we know would have to be involved.
That actually brings the total up to eleven, just like how we thought we'd be getting just ten in Super Megaforce. I guess since Tommy is involved and he's supposedly the greatest ranger of all time, they need ten average joe rangers as support.
Out of everyone in this mix, Gemma might be the most interesting one to me, since she'll be active with all of these rangers without her brother. She'll probably be annoying the others with her penchant for blowing things up too.