>>52117810cyclizar is probably gonna see some niche use, due to its signature move.
if the population bomb bug doesn't get fixed, maushold may see some use there as well. unlikely, but possible because it's game freak.
when it comes to the new box legends it's probably just gonna be miraidon who sees use, koraidon is in the unfortunate position where it loses to most of the big AG mons due to its typing.
take all this with a grain of salt though, AG has historically been very unpredictable.