I've tried to be.
Though I don't even look for it and I found out shit about the game.
However I hope we get more Mercenaries spoilers.
Mainly just want the levels, costumes, and characters.
Though it looks like they're gonna pull a RE5 and have "different Costumes" count as different characters. Which is lame since they'll be costumes they wear in the game.
In my real honest opinion and this is just general advice for everyone :
You should form an opinion about a videogame after you have completed it and seen the ending credits, controller in hand all the while having avoided trailers and spoilers in the first place.
This is how I form one.
By "mercenaries spoilers" I meant the new enemies that may appear in them that we haven't seen anywhere else.