Fantastic write up Jono, really good stuff, but I'd strongly fancy Summerville Boy @ 20's over Supasundae @ 20's, ...
Where can you see 20/1 charlie for Summerville Boy? Best price 16's as far as I can see? (if I can get 20's I will be adding)
Personally I'm not reading too much into the Supreme run. It of course does provide some (and actually the only direct) correlation between BVD and Supasundae and over the same course and distance. The way BVD was ridden during the race means you could say he was value for further but I wouldn't have said Supasundae was
way behind - 4, hd, 1.25, shd separated the 4 horses so approx 5-6 lengths between the pair. A big distance yes but reflected in the price difference.
All and especially BVD have improved but just in isolation of Supasundae and not looking at other horses - Different trainer, jockey and 2 years have passed since where he does look a different horse - notably his jumping has improved considerably so how he handled the 2 miles then, I'd expect better now. That side I do think he fell into the 2 mile division last season only from a lack of competition / merely prep runs rather than a change of stance where connections thought it was his best trip which is always slightly off putting.
I guess i'm just looking at the market as it is now, and seeing how it may evolve once targets have been confirmed for some and some of the trials have taken place. Focusing on just the first 9 in the betting right now and 25/1 and shorter i'd expect...
English Trials
Buveur D'Air 7/2
Summerville Boy 16/1
Irish Trials
Melon 8/1
Supasundae 20/1
Laurina 14/1??? (or chasing)
Samcro 8/1 chasing
Min 16/1 chasing
Faugheen 25/1 stayers
Yorkhill 25/1 who knows?!

(and in this form who cares ha!)
Putting Laurina to one side right now, i can't see much of a fight in the Irish trials and I could easily see Supasundae turning over Melon in one/more of those trials. Hence the 20/1 being pretty big for me and one that if he goes down the division (which i'm thinking they may well do) will definitely get shorter and into single figures later on.
However he's right now probably one of those prices and bets where i'm caught in the middle... He's certainly big enough to get my attention and represents some value
but at the same time because i'm taking a risk on the target and the fav more than likely has the beating of him - isn't a big enough price to make me back him
...yet