It's actually an easy match to book if it happens. Even if Shafir and Duke dont get better you can get around that by eliminating them right away. Then Shayna and Ronda can look good in victory by eliminating all 4 wwe4hw or in defeat eliminating 3 out of 4 when Becky "overcomes the odds" to win.
Biggest obstacle to this happening is Ronda getting pregnant. So we might see this match not long after Mania so she can go on hiatus.