Topps is being fairly coy with releasing the checklist for 2014 Topps Series 1 Baseball before the release date. In a post on twitter – they seem to imply that it will be up soon.
They have been posting some sneak peak photos
2014 Topps S1 Silk Collection
2014 Topps S1 Upper Class Auto/Relic
2014 Topps S1 Upper Class Auto
2014 Topps S1 Before They Were Stars Relics