Orcish little brains!? :O
Anyway, i think most of the orcs would love any world pvp with the alliance, there shouldn't be a problem. I think the best way to get anything started is suggesting what kind of an event (and IC:ly why). You tossed us the invite, so what did you have in mind yourself?

Also bear in mind that in the coming days/weeks the tribe is going to northrend, and the RP focus will be there.