Family drama ruining my excitement for wedding

I'm no longer really excited for my wedding. In the past couple of weeks there has been so much family drama, it's a very long story, but basically my fiancé's brother (who he is not close to) is all of a sudden mad he is not in the wedding when he hasn't cared or asked a single question about our wedding the entire 10 months we've been engaged and failed to show up to our engagement party. He made a huge scene about it and said some awful things to my fiancé. Now my fiancé's other siblings want him to apologize to his brother. My fiancé's estranged father, who he hadn't spoken to in 4 years and just reconciled with in order to invite him to his wedding because he is his only living parent, also started saying horrible things and reminded why we haven't spoken to him in 4 years. Fiancé now wants to uninvite him but it's complicated since he's already rsvp'd, and we're afraid he will show up and make a scene at our wedding. Not to mention the fact that every other guest in attendance already knows what a jerk he is. Also my father, who I have had a very complicated relationship with and have been estranged from the past year or two, is very offended he's not walking me down the aisle. Basically all these things have ruined my enthusiasm and made me wish we had eloped. I feel guilty because up to this point I have been so excited, and my mom, sister, and bridesmaids have worked so hard to make everything beautiful for us and put so much effort in to my shower and bachelorette party. Now the wedding is coming up shortly and I just need to get over all this drama and try to be excited again. I love my fiancé and we are so excited to be getting married. Unfortunately we both have family members who think our wedding is somehow about them even though they've barely been apart of our lives. Sorry for the long post, just needed to get it out to people besides my mom and sister lol.