Hey guys, been playing the old EON version of cosmic encounters with my friends for years and somehow never ran into this problem before. Now I've got the new fantasy flight version and it's caused a disagreement.
We like to play with multiple powers, usually 3 power games, and today I drew the Antimatter, Warrior and Human.
The problem is that the warrior and human both state specifically that they add to the total of your side, and that the antimatter doesn't specifically say that bonuses from powers are reversed in the same way. My friends interpreted it as the warrior and human making the antimatter less powerful and I was allowed to discard the warrior (I was getting weaker with every battle) I kept the human because it's just too damned cool.
I believe that the human's +4 (and eventually +8 with the flare) and the warrior's experience should subtract from the antimatter's total, seeing as the antimatter has no choice but to invert all the cards in an encounter.