The Nokia Lumia 900 has barely been launched, and it seems that thanks to a leaked poster sent in by a tipster to the good folks at PhoneArena it would appear as though Nokia could be working on their marketing strategy for the upcoming Windows Phone 8 platform. According to the tipster, the poster is apparently not in its final stages of design so there could be some changes should it ever materialize, and it is unclear if the images of the phones in the poster are actual products or mere placeholders. In any case, assuming Microsoft keeps to schedule, there is a good chance that we could be seeing Windows Phone 8 “Apollo” by the end of the year. Given Microsoft’s close relationship with Nokia, we wouldn’t be surprised if the Finnish company had been given information ahead of their rivals. Until more concrete proof has been made available, we hardly think that an alleged leaked poster with the words “Windows Phone 8” and a Nokia logo slapped onto it should be worth getting too excited over.