I think if each area is as big as skyrim, or at least near it then i can accept that or maybe two world type big. Theres no way they can give us a whole planet. I'm positive there will be alot of different areas on the different planets. But each place will most defenently be a large sanbox, with free roaming involved in some factor. The world has to be large if there talking about Sharing worlds with others. And then just randomly meeting people while your on a quest these places [b]can not[/b] be small.