I suspect that Scotland will lose a lot of its SNP MPs: a combination of the recent scandals and problems and that wee sleazebag wrecking narcissistic Salmond and being in power at Holyrood for too long, especially in a parliament that wasn't designed for majority (or even minority) administrations as it doesn't have sufficient checks & balances; and Labour deliberately pushing the trope that it needs Scotland in order to get a majority 
Blair never needed Scotland when he got his majorities
and Starmer won't either. In fact, with the recent boundary changes, Scotland will be even less represented, as we get 2 fewer MPs while England gets 10 more.
The SNP were significantly over-represented at Westminster, thanks to the vagaries of FPTP. So I think they'll be lucky to get 15 seats (which would still be better than they got prior to 2015, when +/- 6 was the norm). Labour will recover from its low of 1 and in addition to the SNP seats it will win, will hopefully hoover up the remaining 6 Conservative seats.
(As an aside, to its credit, the SNP has consistently supported PR for Westminster, even though it would have reduced the number of its MPs).