User blog comment:RoyallyBella/Official Season 7 discussion blog/@comment-25830140-20160422221050/@comment-2056915-20160426045615

It's more like a assumption saying Nabu was dead. The line "You could have saved me but you let me die" was more like a continuity to Nick's universe and seasons. It basically does not match with the previous plot line of Rainbow's previous work: From Linphea to Lynphea, from Diaspro was the Princess of a what-so-ever-it-called kingdom to a princess (?) or girl from Eraklyon, from Flora (seemed to be planned) was the Princess of Linphea to Krystal is the Princess of Lynphea and Flora was a liar (?).

I refuse to take that kind of continuity. People can choose to defend (or whiteknight) Nick as they were just the "co-producer". To be honest, Rainbow and Nick were co-producing the show (season 5, 6, 7 -- season 7 still has Nick's involvement if you do not know), they agree things together so using that reason is quite ridiculous.

Maybe Nabu is dead, and Morgana's words were just meant to soothe the loss for Aisha. Or maybe Nabu is in comma. Anyhow, Nabu's fate is undecided and left to be a part of the past. Sadly, there were not any words from Rainbow to clear things out. In a response to a fan's mail (a user called Curelove), Nickbow stated they would let things be clear in season 5, but actually it and season 6 were a hug mess. So, maybe you choose to believe in Nick's continuity for their universe/plot, we do not. And you cannot just spread or force people to follow one's belief.