a possible gaga x rihanna collaboration in the works?

earlier today gaga tweeted this during a Q&A

and then this happened:

(gaga also RTd rihanna's tweet to her.)

this ALSO happened:

now...not to jump to conclusions, but the last time this happened, we heard gaga was collaborating with Azealia Banks. do YOU like the idea of Sex Dreams (feat. Rihanna) (and maybe Nicki Minaj)?