Archie brought this up last season, after I became all giddy about him for the Ballymore, and rightly so, but it ultimately amounted to nothing (the irony that Ferny Hollow was the one who ended up with a season ending injury after taking on Bob on hurdles debut) and Bob Olinger went on to do the absolute business for us in the Ballymore. It can be worthwhile noting horses getting injured or suffering recurring problems, but suffering a fatality on the gallops or racing can happen to any horse, breeding aside.
Bob Olinger is now 6 races in (incl. his P2P) and is yet to have had one issue. Of course, the chances he will at some point in his career are pretty high, most horses end up with some sort of knock/injury here or there, it's almost an impossibility to avoid, given the nature of the sport.
I wouldn't be viewing his current market price/position worrying about the possibility of a season ending injury, as I could do the same for every horse, and I wouldn't be having a bet on the festival at all if that were the case.