After he wins the Supreme, Vautour will be a Champion Hurdle horse next season......which will spring UDS for the Arkle.
It's a fair point you raise, tigger, which I'll try to answer.
I'm not saying that UDS won't go on the ground at Cheltenham. I'm saying that the chances of him showing a sufficiently high level of form to win this Champion Hurdle, on ground which isn't bottomless, has to be questionable. Class-wise, this field is in a different parish to anything he has faced before.
If he goes novice chasing next season, he wouldn't face all of the Big Five in an Arkle. Jezki is probably the most obvious one who might go down that route.....and possible one of TNO or MTOY (depending on how each fares in March). I guess I'm saying the challenge would be diluted to an extent in his novice chasing season, and his theoretical chances would be better. Plus, he looks like he's built to jump fences (to this untrained eye, anyway), and could prove better in that spehere.
Hope this makes sense.