I'm not trying to give you a hard time, so don't read this and think that, but it's got to be said.
By filing before you could ever hope to receive the item, you're not being safe, you're being disrespectful at the very least. I sell things for a living, but I haven't done an eBay sale in 5 or 6 years, only purchases, but I'd never think to file anything the day the auction closes. It sends an alarming message. You have to give people the benefit of the doubt, that's what eBay is all about and that's why the various protections are in place. If someone ever filed a claim on any of my sales before an item was shipped, I'd immediately cancel the sale, refund them their money and be on my way - that type of dispute sends up a HUGE red flag that they're going to be a problem buyer. If I had already sent the item I'd be super paranoid that buyer was going to rip me off - that's one reason I'd never, under any circumstances, sell anything on eBay without a tracking number. But just because someone else chooses to do so doesn't make them a crook - it means they're either very trusting or a little naive that someone else isn't going to rip them off. I buy plenty of items that get shipped without tracking. I don't sweat it because I know I'm protected.
Also, to satisfy my curiosity, on what grounds could any dispute be filed? Did you put through an item not received? If so, I consider that fraud. Yikes.
I hope you get the item and at that time close any pending disputes and send the guy an apology along with positive feedback.
