Will there ever be Resistance 2 dlc?

May be...

NEW WEAPONS, MAPS, SKINS?

Yea because in my bonus disc Ted Price is working hard with Insomniac to make multiplayer the best. So there will be new missions in cooperative and also new maps. Resistance 1 had DLC too so they are doing the same. Though skins?? I dont know what you mean or if you are talking about a cool skin like mine that can't be unlocked. I think they'll have those.

most likely yes....

after all why wouldnt they after all the resistance fall of man dlc there was

quite possibly

Maybe