Pretty sure you could just do 1OA picks, Cup-winning goal series? HOF, 2k Series would work too, basically anything that gets a site badge for a player could work. Rookie cards for the All Rookie team maybe would be a way to do it without doing every single players rookie card made each season. Would not mind all star card packs available during all star game week or something, maybe IIHF cards or something else limited would be cool to get it be a bit more rare/seasonal, not sure if that is feasible with how it works now to have like packs in sets that can be purchased separately.