So got any theories on what happened to these two in the past? Here's my theory:

So these two were originally part of a ninja team, and they were the perfect team, once being able to summon a bijuu, while the other can control a bijuu. Just that alone will bring fear everywhere. And these two created Konoha, and both where evil.
But somewhere along the line, the 1st Hokage discovered the true meaning to being a shinobi, protecting your loved ones. And Madara realized that the 1st was stupid and wanted to bring him back to the evil side. Madara also wanted to use Konoha as a base to take over the world but the 1st would not allow it so they fight. The winner gets the title as leader of Konoha, and the 1st wins and became the 1st Hokage while Madara was sent into exile.
During his time in exile he trained and trained until he was strong enough to summon the strongest bijuu of them all, the nine tailed. When he had finally recovered his strenght and completed his plan to destroy konoha for exiling him, he sent the nine tail but was stopped by the 4th hokage. Madara realized that he wasn't strong enough to take out Konoha by himself so he created Akatsuki and appointed Pein as its leader. Madara's plan was to gather the wild bijuu's that he and the 1st had summoned in the past and bring them all under his control, hoping to be enough to destroy Konoha for good.

So what do you guys think of my theory? lol
If you have any theories of your own please share!!