Well, Dandeer'd be dead and presumably unable to cast any more super-spells unless she had a death curse prepped (possible but unknown).
On the other hand, Yammar might well have just blitzed in and torn us apart in hand to hand without us even being able to flee. This is distinctly possible.
So it'd effectively be a Bad End to the quest. Not Worst End from our point of view, but consider:
1) Dandeer's likely dead. If she has death curses they go off, we don't know if she did or not. Ignore that possibility for now.
2) Kakara's likely dead. With the mind control spell in place, Yammar's probably rather fond of Dandeer, inasmuch as he remembers ever cookie she ever baked and every time she ever smiled while holding his little baby grandson, but none of the horrible shit she's done to all and sundry including himself.
3) Yammar does NOT like people killing family members. Kakara wouldn't even be the first thirteen year old girl he's personally murdered to avenge a loved one. And we've given him much more cause to want to avenge a loved one than any of the Talts.
4) Berra is STILL in pain so great he's beyond screaming. The only person who knows what happened to him is Dandelor, who Yammar and Vegeta may well want to punish or even kill. He will likely remain in pain for way, WAY too long, and may well be broken by the experience. If he's not, there will almost certainly be further fighting after he wakes up.
5) Apra is unconscious and may die fighting when she wakes up and finds out Yammar killed Kakara. Or she may be utterly broken mentally by what's happened to her family, given how she reacted when she saw us get shot.
6) This leaves Yammar, Vegeta, and Jaffur. Yammar and Vegeta now face a variety of problems.
Jaffur hates his mother for reasons his father and grandfather can't even understand (because the mind control is still there). He hates his father for reasons they CAN understand. He hates them EVEN MORE for Yammar killing Kakara, because he has that weird kuudere thing going for us. Him going berserk is probable. Him going berserk and Super-Saiyan Two is far from unlikely. Because it's basically the end of the Cell Games, with him cast as a much angrier version of Gohan, and us cast as Android 16.
Depending on who regains consciousness and in what order, several disastrous one-on-two or two-on-two super saiyan fights are possible. It's going to be VERY BAD, and will probably end with one or more of the other five royals dead, because no one involved has any incentive to hold back anymore. We cannot predict who will be left standing at the end, if anyone, because "they all kill each other off and the last one standing dies of his wounds" is far from inconceivable.
The civil war among the royals will throw Exile society into chaos. Depending on who does what and who kills who, a thousand possible outcomes could result. It will be Very Bad.
Anything that Kakara would be pivotal in the future (e.g. using her Sight and Spirit Saiyan powers to defend Garenhuld) is obviously no longer possible. So there's that, too.
In short, the most likely outcome I foresee is Quest Over, Bad End, if the plan is "let Yammar vaporize Dandeer," because I'm pretty sure we'd be dead before Jaffur/Jaron even regains consciousness.
