The return of a Blackpool-Euston has to be good news for the town, to benefit both its residents and its visitors.
What I believe the service will however need is some sensible calling points en-route to enable decent connections to be made.
I would suggest that these are at Stafford, Tamworth and Nuneaton, for connections to the West Midlands, East Midlands & South Coast, and East Anglia respectively.
The declared intention in the RUS is to have a 10th hourly path out of Euston to the north west, with calls at TV stations and Crewe.
This would allow the Glasgows to run non-stop Euston-Preston.
The destination was a choice of Lancaster, Blackpool or Liverpool (possibly alternating).
To work, this needed more rolling stock, Blackpool electrification, and the Stafford upgrade (and a timetable recast).
How much of this Virgin can implement in December with limited rolling stock is questionable.
You can expect LM to object if there are calls in the Trent Valley.
I'd expect an interim service with few stops.
There might be some convoluted link between the Shrewsbury/Blackpool/Chester services.
Then potentially it changes in 2016 with completion of Blackpool electrification.