NASL expanding into Miami in 2016. They'll play in an existing venue. Wow.
http://www.nasl.com/news/2015/05/20/miami-fc-becomes-12th-nasl-club
The NASL league office isn't in a position to be picky - they have a solid ownership group wanting to start a team in a promising and uninhabited market, so they have to go for it. But wow, they are taking a big risk here going after a semi-announced MLS market. If Beckham launches, that could torpedo this venture before it really gets off the ground.
On the other hand, this could also be the final nail in the coffin for Miami MLS to happen any time soon. So many issues with that franchise, and this throws another cog into the mix. If the NASL team is less picky and accepts one of the city's stadium site offers before Beckham does, there's almost no chance his franchise gets there digs too.
Either way, the tension between MLS and NASL just went up a couple notches. Fascinating. The battle for Miami will play out over the next few years and might really set the stage for the future relationship between these two leagues.
My prediction: Sacramento is announced as team 24 sometime over the winter. Miami MLS officially put on hold indefinitely, and Beckham's franchise option is converted into a $100MM credit towards a future franchise fee. Secondary to this, the St. Louis Rams relocate back to Los Angeles at the end of the 2015-16 NFL season and the St. Louis stadium project is halted, then soon after resurrected in a downsized format by a yet-to-be-formed St. Louis MLS ownership group. St. Louis is announced as team 25 sometime in 2017 to begin play in 2020. Indianapolis becomes the new Sacramento, and fights with the imaginary Beckham FC (Miami/Las Vegas/San Diego) for the 26th spot.