Simonsig is set to make his much-anticipated debut over fences at Ascot on December 22.
The victory of Captain Conan at Sandown on Saturday led the trainer to describe the winner as "a real Arkle Chase horse" but he admitted that stablemate Simonsig was also clearly in the reckoning for the same race.
"We had a good morning with him this morning anyway and the plan is for him to run in a fortnight's time over two miles and three," Henderson told Racing UK.
"I didn't really want to wait until the Wayward Lad (at Kempton on December 27) with him. I want to get on with it and get an idea as to where we sit."