Should Marketers use Solo Products Branding Or Merge Product Branding with the corporate image to assure successful lasting campaigns ?

Hi

Corporate image depends on the corporate CI (Corporate Identy) and branding guidline so all products should support the branding on the company not vice versa

so all your product branding should have the same look and feel of the company main brand and keep this consistency in all your marketing materials so you build up the company brand image.

the simple way to think about branding, look at any Macdonald's for example, all branches, all ads everything they do whatever the product it is the same, this branding!