No. Its not possible to do that because everyone's system is going to be different. You'd have to have the EXACT ID's for everything (Teams, Sports, Seasons, Pools, weeks, games etc) for that to happen. For example, the Denver Broncos might be team_id =20 in YOUR system, however, in MY system, its 4, In Stewarts, its 12 etc etc etc. so a GAME that has team 20 playing team 4 in MY system wouldn't be the same as team 20 playing team 4 in YOUR system. Same with WEEK IDs, Season IDs, Pool IDs etc.
In order to do something like that, the Addon would have to control things like TEAMS, SPORTS, SEASONS etc eg, You wouldn't be able to create your own, you'd have to download it from a SINGLE SOURCE (which would have to be ME and in that case, this addon would be limited to NFL ONLY).
Hope I explain that well enough so you can see why.