Conflicting rumours have emerged about the announcement of Microsoft and Sony's next big home consoles, with a Sony Japan boss pointing to a May reveal -- and other sources claiming it could be on show as soon as March.

The pair of rumours come from two sources. One, reported in US magazine Game Informer, claims both Sony and Microsoft are preparing "Apple style" demonstration events for their new machines at this year's Game Developers Conference, which takes place in the US at the end of March.

But that's not what Hiroshi Sakamoto, Sony's VP of home entertainment, thinks. Sakamoto told tech news site Emol that "we must wait until May at the earliest" to see its next-gen console plans, adding (via a translation robot) that "I can only say that we are focused on the E3 gaming event, scheduled for June's announcement may be in that minute or even earlier in May."

Both rumours suggest Sony and Microsoft are looking to announce their technology before the E3 gaming event, which takes place in June. They don't want to share a stage at this critical time. [CVG & Cnet]