Both are correct. I thought about it for a while and I believe that you would hear the first one more. That doesn't make it more correct, just more used.

I am by no means a expert when it comes to proper English grammar, BUT, Both sound right, but if it were me I I was going to put "will" in the sentence I would reword it like this: "I hope you all will have and awesome future." But the same could be said if you did not use "will" "I hope you all have an awesome future." Really thinking about it (I have been sitting here thinking for about 10 minutes on this question.) "Have" is present tense while will is "future" tense. Because the sentence is talking about something that isn't happening now, then I think "will have" would be correct. You hope the WILL HAVE an awesome future.

There is a mistake in the first line of your question: I would like to know IF..... without the word "if" your sentence makes no sense in English. I hope all of you have an awesome future" is a correct sentence. Also, it sounds like American English rather than British English. Americans drop some words because we like to speak quickly. British speakers include all the proper words to show that they are well-educated.