Is there any idea of how well the Titans sell outside the collector market? I know that Generations is the older child/adult collector line, but it may be easier for Hasbro to use non-G1 characters - or even come up with innovative designs and new characters for large figures - if they don't feel beholden to nostalgia and are confident the figures can sell on their own.
Consumers over the age of 15 account for 15% of Hasbro's revenue.
Going off-topic here, but does Primus have the same recognition across the fanbase that Unicron does? The sort of people who put down deposits for Unicron can already be called 'dedicated', even 'hardcore' Transformers fans, but I can't help but think that people who would shell out for Primus would be a subset of that. 'Re-skinning' Unicron could help keep the development cost down and possibly allow for a lower target while keeping some semblance of profitability, but some may be indignant at the prospect of having to pay hundreds of dollars for what is effectively a made-to-order remould.