YMMV, but to me what I consider a ''teaser'' in film and tv is something that entices me to definitely check out that specific production/episode.
A photo of Lou Ferrigno in green Orion makeup? that one hooked me in, if only for the curiosity factor.
''Something seen before but not in a fan film'', ''a previous set'', ''plotting out their remaining episode quota'', ''linking up to TMP''...I fail to get excited by these.
A notable writer for their finale: seeing as STC has been trumpeting every minor recent guest star as the greatest thing EVER for the last couple of years (the yellow Power Ranger? ), and gushing over the recent addition of Rod Roddenberry to their ranks (whose laudable personal contributions include...?) , I'll wait until Mignona actually has a real announcement to make before being ''teased''. For all I know, said writer could be head of scripting over at Duck Dynasty. If he'd said, say, Paul Dini or Peter David if we factor in STC's available budget, then we'd be talking.
Releasing stills: are we talking about where Spock fires a phaser?
I get it. STC and cast have a gaggle of fans that get all excited into a frenzy whenever Vic sneezes, but I look for substance and quality of script and final product, and a little kitsch is always good.