Rock vs. Lesnar and Rock vs. Triple H. vs. Kurt Angle were a couple of classic matches that involved The Rock and were at Summer Slam. He had some big matches at Mania as well like Austin vs. Rock, part 3, Rock vs. Hogan, Rock in the Fatal four for the WWEC., The other 2 matches against austin, in which he lost. I think the Rock was pretty consistent all year, but for a couple years he was Mr. Summer Slam, 2000 and 2002.
I think Austin was always pushed during Mania season during the Attitude Era. Rock too, but not as much as Austin. Triple H and undertaker and HBK have all got pretty big pushes too during many Wrestlemania seasons. Basically, the WWE pushed their best during the most important time of the WWE calander year to make the most sells possible which is just good business.
These days Cena, Undertaker and Punk are being pushed hard at Mania. Orton seems to have fallen back a bit ever since Mania 26. He had a good match with Punk last year but it wasn`t one of the most hyped matches on the card. Below Cena and Miz and Undertaker and triple H. for sure in hype and build up. It seems as C. M punk is slowly taking the number 2 spot from orton due to his fresher character, in ring abilities and Awesome mic skills. I hope Orton goes back to his bread and butter as being a heel who only cares about himself. This tweener thing may work for kids but it does nothing for to make me interested in watching his matches or promos.
For the years to come I would look to see Punk, Cena, Orton, Ziggler, Sheamus, Barrett, Miz and Rhodes to continue to get big pushes during Mania season. These are the stars and upcoming stars that will lead the business during the next 5 years. or more. Of course, they will keep bringing back the legends during Mania season as long as they can. What I worry about is what will happen when the oldest guys in the business who can still wrestle are Cena and Orton. If they don`t start creating more top guys who are majorly over with the fans future Mania`s will not seem any more important then any other event. Give it 3 or 4 more years and this will be the scenario WWE will be faced with. No more legends at Mania besides Cena and Punk and orton , if you consider them legends. More star power is needed on the WWE roster, and the sooner the better for everyone, WWE and it`s fans.