A Boba Fett movie can still stay true to the OT while still respecting/ignoring the prequels, no problem, since he's a kid in the PT. They'd have to ignore the SE-DVD redub, but that's it.
Coming up with some elaborate move to replace the man inside suit seems like a waste of screen time and a waste of my brain space. As long as he sounds and acts like Clint Eastwood it's all good.
The Dredd movie would be a very good place to start for inspiration for a Fett film. Dredd does almost zero to make us like him, infact he does many reprehensible things. But you love him in the end because he's a man of principle, because he does nothing to make himself likeable and he's a badass warrior.
Also you couldn't go far wrong with Fett in a 'Point Blank' style one-man-army revenge film. Fett gets a job, he's betrayed by the criminal organisation that hired him, left for dead, the money is stolen and he spends the whole film hunting down those responsible, one-by-one until he's stood in front of the big cheese and asking for the 1 million space bucks that he's owed.
