I don't want to poop on your parade, but I suspect those leaves won't decompose enough by spring. But I'll say this: When you rake them into a compost pile in the spring, the lower layer will be full of worms. Leave some of that in place and till it in. The rest you will have to pile up in a corner somewhere, and let it compost through the summer. You'll get a lot of worms in the raked pile too, and the results will be magnificent.
As the summer progresses, you can start using it as mulch around your tomatoes and corn and other larger veggie plants. It will be heavy and wet, so not suited for mulching smaller stuff, but your tomatoes will love it. My corn always thrives with heavy mulching, and stuff like that is super for that. By next fall it will be perfect to till it all in.
What you have done is the best investment you can make for your garden!
Actually, we won't be tilling these in at all...they will just be left to decompose in place. We are building a new layer of soil over my hard pan clay underneath, starting with wood chips in the spring, which have already composted down a good bit to form a thin layer of rich, black soil next to my clay. Now it will be the leave's turn to compost in place and I'll be planting in that thin layer of soil on top of my own and these leaves will make for wonderful weed suppression as they compost in place, just like the wood chips have done all season.
I'll never be tilling again, just using the garden as a huge composting pile, adding more material as time goes along until I've formed new top soil that never gets turned in. This is a method first popularized by Ruth Stout, though she used straw, and later by a guy named Paul Gautschi, who coined the name Back to Eden for his gardening method of using a thick layer of wood chips on the garden and just adding material over the years as those compost in place.
This what my soil looked like in May of this spring, after tilling it well 5 times in a row, followed by a few rains. I had to put all my weight on this fork to get it barely 4 in. into the soil....
In just 5 mo. time my top soil looks like this...a thin layer, to be sure, but it's loamy, rich, moist and black.
Little clumps of grass were allowed to grow here and there, just so I could see how easy they were to pull later on when they were well established....and they pulled out like a knife from butter. In my regular soil one would have to chop them out with a hoe and even then it would require much effort. These came out without any effort at all and they had this moist, black soil clinging to their roots. New soil...not the same soils I've been dealing with for over 20 yrs now.
And this pic was taken in one of our most dry spells of the season...the soil was still moist as could be.
I'll let y'all know how much composting has occurred by spring...should be interesting.