The Lambourn trainer has earmarked the extended four-mile contest as a potential target the nine-year-old after ruling him out of running before the weights for this year’s Randox Health Grand National at Aintree are revealed on February 12.
Last season’s Kim Muir winner had his first taste of the famous Aintree fences on his seasonal return when finishing sixth in the Becher Chase.
Greatrex said: “Missed Approach ran a great race in the Becher – and I was really happy with him, seeing as how he missed the start.
“He has had a quiet time since then, and the plan is not to make any decision until after the weights for the Grand National have been announced – because that is his main aim.
“We will look at something in February, because he will need a good blow-out beforehand. The Eider is one race, and there is maybe the Grand National Trial at Haydock.
“It is a shame Cheltenham is only three weeks away (before the Grand National), because going back for the Kim Muir would be the perfect scenario.”
Stablemate Keeper Hill could bid to book his ticket for the Cheltenham Festival on Saturday in the Pertemps Network Handicap Hurdle at Warwick.
Greatrex said: “He is likely to run at Warwick in the Pertemps qualifier on Saturday, but there is also one up at Musselburgh at the beginning of February.
“I was really chuffed with his last run at Cheltenham, and he seems in great nick.
“After having some hard luck, he has come back to something like what we thought he would be.”