TLC is taking a cue from Bravo’s massively popular fan event, BravoCon, with the launch of a multi-day event for the rabid audience surrounding its “90 Day Fiancé” franchise. Per a press release issued during the WBD upfront presentation to advertisers Wednesday, “In addition to its robust slate of new and returning series, WBD continues to scale its most powerful franchises beyond traditional programming. Building on the massive popularity of TLC’s 90 Day Fiancé, the company announced 90 Day Con, a multi-day fan event designed to extend the franchise beyond the screen and deepen year-round audience engagement.” According to the Warner Bros.…