"Which events do you want to see?"
In case anyone else is wondering why you can't use どっち / どちら here: Apparently you can only use those to mean "which" of two options. どの / どれ are for "which" of many options. https://japanese.stackexchange.com/questions/14997/can-%E3%81%A9%E3%81%A3%E3%81%A1-mean-which-one-of-many
It is wrong to assume someones wants, so in a plain sentence, using -tai for someone else gives the wrong nuance.
However, that isn't the case here. This is a direct question to a person asking them what they want. There is no assumptions being made as it is a question.