Wow, you couldn't be more wrong.
Bekele accelerates off of a aerobic pace, lets see him do that in a anaerobic race. Remember that the 800m is close to being 50/50 in terms of aerobic/anaerobic, the 600m is 25% shorter. Bekele would be in lactic acid heaven at 500m, Bolt as a decent 400m man -- evident from his 400m times from both past and present -- should be more accustomed to that.
I see it as:
Bolt goes through in 47.5, 500m in 60.0, finishing in 1:14. He'd be dying but holding form at the end.
Bekele is probably 48.5 -- but more likely 49.5 -- at best. If he goes through in anything faster than 50, he'd be tying up before he gets to 500m; not to mention that he'd fall apart faster AT THAT SPEED than a muscularly strong Bolt. So realistically his best shot is to treat the race as a 800m with a fast start and hold it to the end. So I'm thinking for him that'd be 51 low; he wouldn't accelerate off of that pace but most likely slow down slightly to a 26.x
Bekele doesn't go any faster than 1:16.5 in any way imaginable (=1:42.0 800m pace, and I imagine him going 1:44.5 over 800m at best).
Bolt goes as fast as 1:13.5 with 43.5-44.0 400m potential in the future, evident from his 45.3 as a 16 year old. He is built for up to 500m when train for the long sprints, but falls apart at 600m (1:13.5 vs. 1:12.8WR by Gray). Wheels fall off if ever attempts a fast 800m.