I'm not sure how to feel about this as Boba has always been my favourite character, and obviously Lucas basically ruined him entirely with AOTC.
As it stands right now, in the new Ultimate Star Wars book (which is basically the spiritual successor to the old Star Wars Encyclopaedias and Guides to the Star Wars Universe), Boba Fett is officially stripped down to exactly everything we see in the films and The Clone Wars. People have been rudely touting this as the end of the retcon speculation, but I don't see why they would spoil the plot of a movie that's at least two years away at this point when they could just update the book later for a few more bucks; I mean, the book doesn't say anything about Rogue One or any of the major plot points about TFA, so why people think that just because it doesn't say that the name Boba Fett changed hands at least once between The Clone Wars and Empire doesn't mean it doesn't happen. I say that the speculation that the PT Boba and the OT Boba are different people is alive and well. This may just be me grasping at straws, and I wouldn't be surprised at all if it didn't come out that way.
In the Clone Wars, Boba does become a decent bounty hunter by the time we see him in the series for the last time, but he still never dons the Mandalorian armour in any significant way. The helmet he uses is something totally different in fact. This may not actually mean anything, because the Untold Clone Wars panel at Celebration this year had rough footage of Boba and several other hunters fighting Dooku with Boba finally armoured up as we know him, but since the series never made it that far means that PT Boba hasn't ever worn the armour at this point, which leaves a lot of room for artistic interpretation for his film. Of course, by that time, Daniel Logan will still be at a good age for an origin story, so it's really still all up in the air.
I, too, would love to have a Man With No Name-type space western, like skyjedi said, but that will be very hard to do with an origin story where we already have knowledge of the kid from AOTC.