And just what would that bring either one of them? Since they both would have to reinvent the wheel. so to speak, I.e. a competitive device!! If PEP wanted coffee, they could have bought SBUX YEARS ago!!
I didn't even think of those two!! Knew Kraft & Nestle have been mentioned as possible suitors. ACTUALLY, I think your more interesting choice is SBUX - now that would be interesting since they already have tried the carbonated drinks!! AND, everyone thought they were going to take on/knock out the Keurig coffeemakers when they entered the market with their Verisimo!! Didn't happen.
However, I still PEP is the one that has to do something/move -- do you really think PEP would want to end up having to license/partner their syrups with a company benefiting their top competition (KO/GMCR)!! And I don't think SBUX has any machine viable on the market NOW as SODA does.