Yeah. He really was a crazy man.
Kelloway: Doyle, get in the car.
Doyle: But I ordered Onion Rings.
Kelloway: Doyle!

Lugosi's monster never even mentions that his name is Ygor. Some of the monster's lines such as "(Frankenstein's) son gave me a new brain, a clever brain" probably just didn't provide enough information for somebody who didn't see the previous film to understand what was happening.
I had read that Lugosi's lines were cut because the subject matter was about how Ygor wanted to take over the world and this hit to close to the audience's fear of the Nazi's and WWII
Don't call me
sugar!!

jquirk-1:
Lugosi's monster never even mentions that his name is Ygor. Some of the monster's lines such as "(Frankenstein's) son gave me a new brain, a clever brain" probably just didn't provide enough information for somebody who didn't see the previous film to understand what was happening.
Doesn't that line suggest that he has no memory of his life as Ygor? He seems to be speaking from the perspective of still being the same Frankenstein Monster, rather than as Ygor in a new (at least to him) body.
The GREEN HORNET Strikes Again!

In the screenplay, there really is no explanation of what happened to Vazec at all. The last mention of Vazec in the script is that he fastens a fuse to the dynamite. There's not even a word about Vazec lighting it. After fastening the fuse the next scene at the same spot is simply the dynamite - already lit - exploding.
Speaking of the script, after just reading it for the first time, it is really a shame Lugosi's missing scenes have never been found. Not only does he have some really funny-sounding lines, Chaney does, too.
Reading it makes one wonder how releasing this movie in 1943 with Lugosi's dialogue sequences intact would have affected the sequels, like "House of Frankenstein" and "House of Dracula?" Or even "Abbott and Costello Meet Frankenstein" for that matter?
Maybe the sequels would have never been made? Or maybe they would have been made but as completely different movies? Maybe Lugosi would have played the monster in all of the sequels, including in "Abbott and Costello Meet Frankenstein?" For that, maybe they would have brought back John Carradine to play Dracula for a third time?
The reason the preview of FMTWM was a disaster is likely because most people in the audience had never seen "The Ghost of Frankenstein," and simply didn't understand why this monster was speaking with a Hungarian accent. Instead of removing the dialogue, Universal should have added one of those short sequences at the beginning that explains everything that happened before by showing footage from "Ghost of Frankenstein."
Lugosi's monster never even mentions that his name is Ygor. Some of the monster's lines such as
"(Frankenstein's) son gave me a new brain, a clever brain"
probably just didn't provide enough information for somebody who didn't see the previous film to understand what was happening.