I doubt they will change the layout from triple to a mega long one. But since SM6 without a booster has been tested on Super Hornet as an interim solution for next gen LRAAM, why not for F-16?KAAN central IWB is configured to carry 4 Fox-3's in a non-staggered format, in a manner similar to the SU-57:
View attachment 60870
Two AMRAAM's end-to-end measures 7.3 meters. Their wingspan measures 96.52 cm, tip to tip.
Therefore, four AMRAAM's will occupy a space measured 7.3 m x 96.52 cm x 96.52 cm inside the bay.
According to İbrahim Sünnetçi, Siper block-2 measures 6,2 meters and has a diameter of 42 cm.
Therefore, if the 2+2 IWB layout is turned into 2+1 mega bay layout, it is feasible to assume one can fit two Siper block-2's AND at least 2 MK-81's in place of 4 AMRAAMs.
Or just 2 Siper block-2ER's. (assuming they stay under 8 meters as @KAZooMAN s estimates https://defencehub.live/threads/air-defence-programs.65/post-286831)
This is how.
But again, we have GÖKHAN project going for that role, and a liquid fuel ramjet should certainly bring a chubby engagement envelope. Only info to be released will tell us about how viable would it be to develop Siper B2 into an AAM.