The “Jordan is Palestine” option is a tempting alternative, as recently expressed by MK Aryeh Eldad. While Hamas-led Gaza adds complexities to any option, interest in “Jordan is Palestine” has been stimulated by the recent Arab uprisings and tensions, which have certainly not bypassed Jordan. Pipes and Garfinkle some time ago expressed here their concerns that such a move would be unsuccessful, destabilising and dangerous to Israel. However others promoting the idea include Geert Wilders, also on video here. A few other related comments are here, here, here, here, here, here, here, here
Rather than “Jordan is Palestine”, a more successful outcome may come from a “Jordan and Palestine” federation that respects the fact that while there is a majority of Palestinians in Jordan, they have a different life experience from those of the West Bank, and that Jordan has a different population composition. It would take away the necessity for the West Bank Palestinian portion to be a fully independent entity from Jordan, which it is unlikely to be. It also lends itself to the possibility of more creative Jewish and Palestinian coexistence and separation in the West Bank, and ongoing Hashemite leadership in Jordan and Palestinian leadership in the West Bank, while bringing to mind the nomenclature of Bosnia and Herzegovina
Either way, Jordan is an important player in the mix whose role has been underplayed.