I think that Putin will most likely cooperate and Trump will force Ukraine to stay neutral and NATO won't expand towards Russia but I find it difficult to answer what will happen in the Israel-Palestine war because Trump is a huge Israeli supporter, he has said many times that he is going to support Israel and will do everything to protect them. If he gives Israel weapons and soldiers, that will turn into a serious war against Iran.
Ending war means a lot also to neighboring countries. The world has been influenced by this war, and most are still recuperating from the impact of this event. Whereas, Ukraine and Russia, have a lot to face after this war. They will need a lot of help to return to their normal lives.
Trump being in the office will be an interesting one. Some of his programs are quite radical. So let us see how he will finally stop this war, if in case he can. And what are the projects involved in the aftermath of the war? I believe he has a lot to do in his office. I hope there will be less hearings when it comes to defending his actions as he can't do his job because of these interruptions.