5 years out.
MLB is bullish on Austin. I think the next two cities, be it through relocation or expansion, to get a franchise will be Austin and Nashville. I've always told my friends it would take the backing of the Ryan group, Nolan and Reid, to really have any chance of landing a franchise. For those not familiar with baseball they own the triple AAA RR Express. Everyone knows who Nolan is and Reid has had extensive experience in MLB with both the Astros and Rangers. They have a lot of pull and with the right backing should have a great shot. I've heard they have a group in place that is actively working on bringing a team to the area. I've also heard that they would like to locate the stadium around the Domain near the Q2 stadium. Here's a good video put together about MLB expansion and what cities are candidates. Austin was top two.
https://www.youtube.com/watch?v=02DNqy0GSnY