I am guessing the BG rewards will be similar in quality to the PVP armour already available on PVP servers. That gear is of a slightly less quality to that in available to raiders but a good group of experienced PVP’s in full PVP gear can easily match a good group of raiders.
People playing on PVE servers need to realise that PVP is completely different to PVE. I imagine BG gear will be somewhere high above that available from questing/instancing but hopefully below that available to PVP servers for open world PVP which in turn should be slightly below that of raiders (as it is now).
I had a discussion with one of my long time officers the other day when he made a comment along these lines: In order to balance the battleground for non-raiders, SOE will need to provide some gear as rewards from these battlegrounds that is at least competitive against raid gear (so that raiders don’t dominate the battlegrounds). However, if the gear from these battlegrounds is too good, it ends up reducing the impact of raid gear (or outright trivializing it).
Either way, battlegrounds will directly compete against raiding.
Really, cross server pvp, I like the sound of that.
Everquest II cross server PVP battleground map.