ive been playing for quite a bit but im still a bit new and i was just wondering if there's ever gonna be any new updates with new attack animations, mega evolutions, the ability to catch legendaries, etc

There's usually no timelines given towards new content. Staff will announce when certain things are ready and available to be accessed. Keep in mind staff are constantly updating and adding things, within the last two weeks Honey Trees were added and Excavation sites were revamped. These are 2 fairly decent content updates that added new spawns to the game and even added a new map. Regarding move animations and Mega's, both have been requested numerous times. I don't know if there's any plan to introduce mega's (as they were once planned but since have been scrapped) and I believe animations are limited to very few staff being able to work on them.

 

There are currently many catchable legendaries in game, there's a thread on how to get them all located here --> https://pokemonrevolution.net/forum/topic/75116-url