Could do with something else for now, then we can have Mew's New World later down the line.

Yeah that's true

Maybe Mega Malamar rewiring another Pokemon's head (like Absol) so much, that it changes them into his permanent Mega slave?

I’m open to anything involving Mew right about now; but I might change my mind in about a week.

Typically for Pokémon, any TFs involving Mew, Victini, Manaphy, Raichu (Kantonian), and Glaceon are ones I pay special attention to; but feel free to do whatever.