The coronavirus outbreak brought Blackpool’s 2019/20 campaign to a premature end, while Fleetwood Town suffered a play-off semi-final defeat to winners Wycombe Wanderers.
But how do the bookies rate the pair's chances of earning promotion to the Championship this time around? Scroll and click through the pages to find out:
1. Sunderland
Odds for League One promotion: 9/4 Photo: Clive Brunskill
2. Peterborough United
Odds for League One promotion: 11/4 Photo: Alex Burstow
3. Charlton Athletic
Odds for League One promotion: 11/4 Photo: Alex Pantling
4. Portsmouth
Odds for League One promotion: 3/1 Photo: Dan Istitene
5. Oxford United
Odds for League One promotion: 10/3 Photo: Alex Davidson
6. Hull City
Odds for League One promotion: 7/2 Photo: Ashley Allen