I'll bump this thread by providing info I allready possess.
1. At first they will be dominion only but Riot allready stated that these items maybe used on SR based on players feedback. So we will almost for sure see some of the new items on SR as well.
2. Nothing has been stated about this but i'm sure this info will be released to us as we move closer to gamescom and pax
3. Afaik, banshees veil, wards and some other items(don't know which) again, it is my strong believe this will be communicated at a later time
4. Well, They did say that they try to make sure all archetype's are balanced by balancing the items so I guess this indeed means possibly altered stats and effects on some of the items we know allthough I guess it will be mostly stats that differ and not other effects.
I also believe that item tweaking is one of the things that they will be continually tweaking on until they release domion But i'm sure they will enclose more info in a bit.
Anyways, bump for a red post