San Jose is getting another pro sports team — but rather than the major-league baseball team the city covets so much, San Jose is getting a second hockey team. There are few instances of pro franchises sharing venues with affiliates, and the logistics will be tricky with two hockey teams playing their home games at the same arena and also practicing at the same site, Sharks Ice in San Jose. Additional dressing rooms will be built at both rinks — SAP will need four hockey dressing rooms, total, because the Sharks envision several Saturday doubleheaders, of a sort, with the AHL club playing Saturday afternoons and the Sharks the same evening. It might serve for a few games per season — particularly next year, which will mark the Sharks’ 25th anniversary in the Bay Area; they spent their first two seasons at the Cow Palace. [...] there is speculationthe AHL team eventually will be based in one of Northern California’s planned new downtown arenas, either in Sacramento or San Francisco. [...] the AHL is higher quality hockey, the equivalent of Triple-A baseball or even a tick better, with more than 300 NHL players spending time in the AHL every season. From a hockey standpoint, it will be a major plus for the Sharks to have their top prospects in the same building, rather than 3,000 miles away, for evaluation purposes or in the event of injury.