What if there was a different Mama Bear boss fight in Bearly Buried?

So, after gathering all the soul shards and ring pieces in zone 3, Doug Houser comes to the altar, but Mama Bear is already there. It is revealed that Doug`s success was Malak`s plan, so he would bring all the ring pieces to her. Mama says that she has been only toying with Doug, and his worst nightmare is about to start.

Then, she absorbs Bierce`s power from the ring pieces, and becomes even stronger than her. Now, Mama appears in her nightmare form, being a bigger, purple version of her with white eyes, sharp teeth and long limbs.

-Now, Doug is inside of a round room, with eight altars in it. Also, it is connected with a small tunnel system.

-Doug must charge all eight ring pieces from the altars.

-Mama Bear will chase him down. He can not harm her, only slow her down by luring her into the tunnels and collapse them by using telekenesis.

- Mama reverses Doug`s abilities. When he tries to run away from her with a speed boost, he gets slower. When he tries to telepot away, he instead teleports right to Mama. By using telepathy, he gets his eyes popping out. Stun and vanish simply don`t work on Mama.

- In one of her death sequences, Mama reduces Doug to the size of a cockroach, and crushes him. Bierce said she can do that, but didn`t. Mama Bear does.

- After all the ring pieces are charged, Tammy`s soul ( I suppose the blue floating sphere is Tammy`s soul) teleports Doug back to Mama`s house. There, he is chased by Trigger Teddies, and then by Mama and Malak. Eventually, he escapes.

That was my idea of what could Barely Burried boss fight be.