Now I am not an expert on the subject area so don't go flaming me but why do people want this to happen? I mean, I understand those who are fans of the original two games but what about those who like Fallout New Vegas? Without Bethesda's game engine or resources, I don't think Obsidian would be able to replicate a world that's as rich and detailed (Don't get me wrong, Obsidian story writing is some of the best in the industry). But, if they took over full control of the whole production of the game, it would most likely go back to the original set-up, which would be the player viewing their character from above, not as much as an open world, no more first person.
And even if they tried to follow the games up in the same style of fallout 3/ new vegas, then they still will need to build the engine, the game world, everything in it, do you think they will be able to make the games as rich as they did New Vegas? (where a lot of the work was already done for them).
I am not taking sides, I am just very interested in peoples opinions on this subject, taking into consideration what I have said. I look forward to reading your replies.