MC doesn't come before OOT. MC has the Four Swords in it so it has to come after one of the Four Swords games.

And Lanayru is just telling you the backstory of the Interlopers and the Triforce and the Fused Shadows. Nintendo likes to tie its Zelda games together sometimes with backstory. They never give hints on the next game in another game. They don't even sometimes know what style or storyline they're going to give the next Zelda game.