Bob is there any chance that you use some cutted dialogue from the duel against Dooku, in Mustafar?
In ROTJ Vader says "ObiWan once thought as you do" to Luke... and you have this line "this time we will do it together" by ObiWan... perhaps you could manage to insert it at some point of the dialogue as a last attempt ot Kenobi to recover his friend, and what's more could be an autocritical sentence (while in the original dialogue that line was ObiWan scolding Anakin, now it could be "hey, we've been wrong pulling you aside, please join us to destroy palps, this time we'll do it together")