YOU SAID:
i wonder what i'll do today
INTO JAPANESE
今日は何をするのだろう
BACK INTO ENGLISH
What are we going to do today?
INTO JAPANESE
今日は何をするつもりですか。
BACK INTO ENGLISH
What are you going to do today?
INTO JAPANESE
今日は何をするつもりですか。
BACK INTO ENGLISH
What are you going to do today?
That didn't even make that much sense in English.