Why Katappa killed Baahubali? Five Crazy Fan theories we found on Quora

Here is the first one:

"1st scene is both bhallaladeva and bijjaladeva will disuss about bahubali and sivagami and will plan to kill bahubali.

Bahubali owns mahismati kingdom.Bhallaladeva and bijjalaladeva jealous about bahubali victory.Then bhallaladeva ordered kattapa to kill bahubali otherwise he will kill sivagami.

Then Both Kattapa and bahubali together play some drama to save sivagami. Kattapa will tell bhallaladeva that bahubali had died. So, then he will not kill sivagami. Bahubali lives in secret place may be Kuntala where he fall in love with devasena.

After some years bahubali tried to kill bhallaladeva to take revenge, but unfortunately bhallaladeva will escape from bahubali attack,

Finally, he began to warn subbaraja(Who plays Anushka brother) king of Kuntala to kill bahubali other wise he will kill all kuntala people. So, forcefully subbaraju will kill bahubali and hand over Anushka to bhallaladeva.

At this this time Anushka give birth to sivudu and ask sivagami to save her child sivudu from bhallaladrteva by touching sivagami feet(Emotional part) with blood hand.

Then sivagami introduce sivudu to mahishmati people(Sivagami shouting moment in Bahubali-2 trailer-Amendra Bahubali).Mahismati people shouts Bahubali is back as Amerendra bahubali(Interval Bang).

Then, bhallaladeva ordered to his army to kill Amendra Bahubali,Since sivagami promised to devasena that she will save her child sivudu so, she try to save sivudu (Bahubali-1 introuduction).

Then bhallaladeva keeps devasena as a slave and he will punish all mahishmati people for supporting Bahubali.

After some years,Bhallaladeva came to know that bahubali son sivudu is live and will return back to take Mahismati kingdom then he again ordered kattapa to kill sivudu.

Again both sivudu and kattapa will plan to play drama but this time bhallaladeva will identify kattapa -sivudu drama and he will take revenge on kattapa and will kill him.

Finally,Sivudu will kill bhallaladeva (Climax fight)and takes mahishmati kingdom"

The second is by Hem Anand:

Hers is No3 Shanky Rungta:

No4 by Prashant Rao:

"My guess is, the whole conspiracy revolves around "Bhalladeva" and his hatred towards his brother "Amarendra bahubali" and his wife, "Devasena", who rejected Bhalladeva(as mentioned in the movie)

Katappa was a man of integrity and one who could be trusted. It was mentioned in the beginning by kattappa that he was a slave to the throne . Also the queen Sivagami shouts out to the lord to save the child's life and not punish him for her mistakes.

Connecting these dots, my guess is that -  

And finally No5 by Vibhav Kshitz:

"Katappa killed Bahubali because he was instructed by Bahubali to kill himself.

Amrendra Bahubali has been presented as a humble, innocent king who happens to be a proficient strategist.

As he becomes the king of Mahishmati and marries Devasena( who was also admired by Bhallal Deva) the disputes between the brothers ignite.

Amrendra adores his brother Bhallal Deva, but he is also aware of the fact that Bhallal is planning to kill him and rule the Mahishmati is Dictorial Style rather than the Democratic one.

that is why, Amendra Bhahuballi tells Katappa to join the crusade of Bhallal Deva and become his informant.

Bhallal”s cunning brain doesn't trust Katappa(as he had sworn to protect the king and the kingdom) but Bhallal couldn't ignored the fact that Katappa was a skilled warrior. So he decides to keep Katappa at his side but with minimal information.

Lastly when Katappa learns that an attack will be performed on the king Bahuballi, Bahuballi tells Katappa to kill him(as he couldn't see any way out of it). He tells Katappa to kill him which would turn on Bhallal deva”s trust towards him(katappa). And once Katappa has Bhallal”s trust he could save Mahishmati

There you have it 5 of the wackiest theories we found on why Katappa Killed Baahubali