SilverWook said:
Wearing Jedi robes while hiding out on a backwater planet makes perfect sense. ;)
Obi Wan actually wore black in an issue of the Marvel comic set during the Old Republic, as did Luke at one point. That could have influenced the ROTJ look.
Obi-Wan as a hard, seasoned general dressed in black is awesome.
Maybe if Marvel had kept the rights we would've seen a weird cross-over: Obi-Wan VS The Punisher. Weird thought, but awesome. =P