I'm sticking close to my guns on this one, key trends I'm following
1) Course experience
2) Not a novice from last season, unless winning/placing in Kauto Star Novice chase
3) Has experience over 3 miles
Only horse that has broken these trends in the last 10 years was Thistlecrack, a 174 rated, grade 1 winning stayer hurdler who who the King George via an unorthodox campaign
Dont fit
Chantry House - Lacks course form, and a novice. Has 3 mile experience, but... still need to prove it to me
Espoir De Romay - Lacks course form, and a novice, I'll just about give him 3
Asterion Forlonge - Lacks course form*, and a novice and doesnt have 3 mile experience (but I've backed him for the gold cup lol - wtf!!)
Envoi Allen - Lacks course form*, and a novice or have 3 mile experience
*Now, it a little harsh marking down the Irish for not having Kempton course form, as its unlikely they would come over as novices. So, I will be less harsh of them for that
Questionables
Mister Fisher - 3 is still a question, does he stay. A 2 horse race over good ground at sandown doesnt tell me much
Champ - Lacks course form, and thats a concern given his jumping
Imperial Aura - Lacks course form (UR), Limited and poor 3 mile experience
Waiting Patently - 11, can't where further improvements to win this
Royale Pagaille - Novice from last season, but could be an unorthodox. Personally, not sure he'll be good enough - need to re-watch his performances
Fakir D'Oudairies - Cliff horse. Can't see it myself, questionable stayer
Shortlist
Update: 29th September
Thanks for Madmoose's post, realised I didnt analyse
Shan Blue.... and boy, do I like him!
1) Course experience -

nthego:
2) Not a novice from last season, unless winning/placing in Kauto Star Novice chase -

nthego:
3) Has experience over 3 miles -

nthego:
I really like his profile! ... and I love his price! 50/1, boosted on Betfair to 55/1
Has reasons for under-performing at Cheltenham and Aintree, that Scilly Isles was horrid! I dont want a KG winner that acts around Cheltenham, I want them to act around Kempton and this lad jumped for fun in the Kauto Star!
Unless alot of the horses higher up in the betting, this lad is targeting the King George
I'm in. 56/1 and threw in the each way aswell, why not at that price
Clan Des Obeaux (5/1) - Betfair left a mark, and last years King George lack any pace, downgrading the race to a Ryanair. Nicholls has learnt from that, similarly "dont run this horse are cheltenham". Nicholls is the man for getting horses to run up to their mark first time out, did it with this fellow last year in the Betfair giving Bristol a good battle in unfavoured conditions on a less favoured track. I'm expecting a better run from him this year, near his best. Hopefully there's a little bit more pace in this race or he pushes forward to make some
Allaho (8/1) - Not ran a Kempton however, Irish dont normally travel over. Two up on Vautour on above trends, Allaho has ran in 3 miles, and is 3rd season chaser. Not sure whether he'll come over.
Frodon (14/1) - I was quick to discount this horse from this list, but added him back on. Had it all his own way last time, similar to the Ryanair which he was unable to replicate. Will leave on short list and review again later
Saint Calvados (33/1) - Reminds me of a Cue Card, coming back his second attempt and improving on it. With Nichols now. Is this another Real Steel or can Nichols bolster his KG squad with a lively contender. Good effort last year, first time out and early season disruption. Have three concerns, firstly whether or not that Cotsolds chase left a lasting mark, secondly does he actually stay (last years KG pace was poor) and will he improve on his jumping as he jumped left at a few. Targeting the 1965 chase, which feeds alot of placed on-stayers for the King George. The more I write, the less I like