The outstanding eight-year-old missed the first half of last season after undergoing wind surgery, but returned as good as ever in the spring to claim a third Cheltenham Festival success in the Queen Mother Champion Chase, confirming his place as Timeform's highest-rated chaser in training on 179p.
Altior gains his third Cheltenham Festival success and maintains his unbeaten record over fences (8-8) with a superb victory in the Champion Chase @CheltenhamRaces. #TheFestival— Racing UK (@racing_uk) March 14, 2018
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He went on to win the Celebration Chase at Sandown for a second time, and has not been seen in competitive action since.
Altior is reported to be in rude health ahead of his seasonal reappearance, with Henderson still considering whether to run at Cheltenham next week or head straight for the Tingle Creek at Sandown on December 8.
He said: "He will probably get entered for it (Shloer Chase) and we will talk about it, but it is possible he will just head to the Tingle Creek.
"All those big horses are in good form and worked yesterday (Wednesday)."
Henderson is also looking forward to the return of his stable jockey Nico de Boinville who has been sidelined by a thumb injury since being unseated from Henderson's Before Midnight in a Chepstow maiden hurdle late last month.
Henderson added: "Nico was in this morning saying he can't feel it and it doesn't hurt and that he will be riding out next week.
"I think he will be back for Might Bite (in the Betfair Chase at Haydock, November 24)."
Published 15:50 08/11/18