Other relevant things from the article: Barney’s rebound bro in 3.18 will be played by Will Forte. [AMAZING.] And, spoilers:
As previously mentioned here, Barney and Abby are a [sham] couple in 3.19, Everything Must Go – but Kristin adds that Abby is, in fact, in on the scheme, because Barney’s not the only one looking to get back at Ted. As for Barney popping the question, I think we all know the likelihood of him following that all the way through to a wedding is about as likely as Lily being the mother.