Brock only wrestles about three times a year, with sporadic appearances every now and then.
That's true. But don't forget way back when, the Mega Powers team worked out pretty good, and they only teamed up once in a great while, so them teaming up could be a 2 or 3 match thing.
Ryback is nowhere near Lesnar, Taker and Kane's league.
Your 100% right. But taking Axle as an example, he wasn't in HHH's Cena's or Punks league either, but he was put in matches & storylines with them to make him more credible and it worked. Undertaker has been used at Wrestlemania in the past to put guys over, same with Kane. But putting Ryback with Lesnar, and or Undertaker and Kane helps put him over and more credible.
Its why Ryback is entering a feud with Punk, its to help put him over even more, besides the help from Heyman.
Now in terms of Rybacks strength, power, look, ect.. he is in the same league as Lesnar, Undertaker, and Kane.
Ryback is not at the level, where he can face Brock Lesnar yet, especially at Wrestlemania of all places. Lesnar VS Undertaker or Lesnar VS Punk II are potential must-see matches at Wrestlemania XXX, no Ryback VS Lesnar.
You do know Undertaker vs Lesnar & Punk vs Lesnar are both rematches, the trend thats been going on with Wrestlemania's the past few years, I'm just not totally sure that trend keeps going on for Wrestlemania 30, as its been one of the gripes some have had, with having HBK vs Undertaker 1 & 2, HHH vs Lesnar 2, Undertaker vs HHH 1 & 2 ect..
But your wrong on one part, your saying Ryback isn't on the level of Lesnar or Undertaker at a Wrestlemania event, way back at Wrestlemania 18 neither was Albert or Nathan Jones, or Mark Henry at Wrestlemania 22, but those happened. And a few years ago it was HHH against Sheamus, and Sheamus sure wasn't in HHH's league for that Wrestlemania, when you consider years later its back to back HHH vs Undertaker, with Sheamus not even making the card. So its not a stretch to put future talent matched up with established talent, no matter if they are the status of Undertaker, Lesnar or HHH.
Not saying I want to see it with Ryback, but I am saying anything is possible. And things can change in 6 months. Who would of thought Eddie would of beat Lesnar to headline Wrestlemania 20 against Kurt Angle, anything can happen.