Ah...of course it'd be the one version of Sentinel I didn't check on the wiki, because I forgot about continuity clusterfucks.
He's a weird design. A good one don't get me wrong, but weird when you look at who he's supposed to be and who he pulls from design-wise.
The Wiki considers him the same character as Bayverse Sentinel Prime, despite sharing almost no design elements with him (if I was being charitable his shield blade thing KINDA invokes DotM Sentinel's shield but that feels like a stretch).
Meanwhile his colours harken to Aligned Sentinel Prime (who was based on Animated Sentinel, and then retroactively G1 Sunbow Sentinel) but his aerial alternate mode is reflective of G1 comics Sentinel Prime's alt modes in the latter half of IDW 1.0 and in IDW 2.0.
So he's sort of the Alpha and Omega of Sentinel Primes, pulling a little bit from all versions (except, funnily enough, the version he's canonically supposed to be according to the wiki).
Part of me wishes he got a face plate (the ridged face plate G1 comics settled on for Sentinel is one of my favourite face plate designs in Transformers) but he looks perfectly cromulent without it. He's a good looking figure, just a bit let down by the line's size and budget.
So I'm hoping the rumours of a Studio Series glow up are true.
The toy was only just recently released to stores.
The Target on W Hillsborough has the full first wave of TF One product out if you're looking.