I’m sorry, but I just can’t see it. Not without a significant improvement in speed.
I don’t see all those as being negatives, you said it your self, Gay isn’t able to touch him, so I don’t see how he would make a difference, I don’t think training for the 100m and 200m has made that much of a difference and the track has turned out a plethora of PB’s, NR’s and SB’s across multiple events, regardless of what was thought of it pre-champs.
As has already been pointed out, the 150m in Manchester was on a 150m straight. Most estimates I have heard put the cost of the bend at roughly .3 over 100m. This would put Bolts curve at 9.88 based on the 100 - not that different to the 9.92 reported by the IAAF biomech team. His second 100 was 93.4% of his first; MJ’s was 90.9%, which would give Bolt with a 9.88 bend an 18.99. If Bolt were to match MJ’s speed maintenance, he would have to run a 9.77 (:.~9.47 for the 100m straight) on the bend (Asafa’s 100m WR only a couple of years ago), followed by an 8.88 (Fastest recorded relay split other than himself and Asafa, 3/10ths faster than MJ and a .44 second improvement on his own).
Regardless of the negative factors, I just don’t see him going near 18.6X.
BTW, I didn’t put 2 and 2 together before, but Jim Bradley owns the Jim Bradley speed-ball company, no wonder he’s keen on them for athletes!