Juan M Leria
@Mike.
The name 'Heller/Humbrol' reflected a change in overall ownership, but soon later (3-5 years) come back to 'Heller' alone. I think it's not interesting for us to open a 'Heller/Humbrol' company.
But 'Humbrol' alone released kits from other companies too, so it should have its own place.
I agree about the second comment.
@Gunther.
The question it isn't about the inclusion or not, but 'How to classify' them. We must include all we could (if space available)

Burkhard D
Let's be pragmatic, there is no 'perfect' solution.
Italeri and Italaerei go together very well, because they share the same catalogue numbers. Take Revell-Italeri kits: If the catalogue number is "H-xxx" it obviously fits into the Revell line, if it is something else it goes under the Italeri label. Same for Minicraft-Hasegawa or Minicraft vs Academy-Minicraft. Let's just judge by how the few kits in question fit into 'our' product ID system here.