Lucario still has the same type, the Fire/Fighting was a typo by Serebii.
I don't think all the Mega stages will be fan favorites...now if so then Rayquaza should get one as it got voted the favorite mascot back in Gen V...
I highly doubt Legendaries will get mega evolutions.
And I'm glad...Lucario will still be a dragonslayer then.
These new Megas might also have expanded movesets, of course, almost all pokemon will, aside from the choice few...Since they'll of course be releasing new moves, and new tms.
I wonder what moves will be TM and what moves will be Move Tutor...but that's a different thing.
Back to the point at hand will the movesets be expanded beyond the introduction of new moves for megas. They're supposed to be powerful versions, so why not?
And I just noticed the new thing about Mid-Battle transformations. I don't really think burst mode, as in essence, all digivolutions are pretty much mid battle in the anime.
Now, it's more like the games, where normally you can only digivolve at the farm. But, you have Evolution items that allow you to temporarily digivolve in the middle of a battle. That's what it's copying.
So then, what will be the triggers? How will these items work? Will it be some sort of, Super Saiyan transformation, triggering at critical? Or do you have to have the stone in your item bag and USE it on the pokemon? What then, will the stone be a one-shot item, or will it be continuous use? Will the stones all be specialized, working only for that species of pokemon? Or do you just need one stone for all the ones capable of Mega-Evolving?