Ugh, it's still vague from what I've found: http://forum.worldoftanks.com/index...15b-will-be-moved-to-tier-10-td/page__st__140 Well, it's a bet that some of us are making based on what WG has done before. TO be honest, WG has done a few things that didn't quite seem business-savvy in that it didn't put money into their pockets, so I'm not sure what to think. WG gave me a tier-8 premium (T34), and gave me my tier ten IS-4. I'm not sure what to think. PS - sorry about putting out the info on your IS-7, but even withthat info it's a tough tank to beat. Um, IIRC I researched and bought the then tier 9 heavy tank (which was the tier T34 ... I can't rememeber though). Then they gave the premium T34 to anyone who owned that tank, and I can't recall but I think they gave me the M103 to replace it (which was, to me, a huge improvement at tier 9 ... but then some of the skills I have today I almost certainly did not have back then... my 50 or so tries to fight in the then tier-9 T34 were just painful, and it took me a while to recover from that loss ratio... there again, i never was able to research the biggest gun for it back then either). Man, I am the worst for asking questions about the history of the game.