I can't imagin a sign as described above in the Spiderman section of the parking lot - or anywhere else on Universal's property for that matter. In addition, even if there was at some point - Universal had nothing to do with putting it there.
And to second the squashing of all rumors, there is nothing currently in the works for a new roller coaster at either of the Orlando theme parks. But, yes, there is a good chance that - if and when a new roller coaster is built for Universal Orlando - it will probably be manufactured by B&M. Both companies learned a great deal from each other during the opening of IOA and still have an excellent working relationship.
*** Warning: Opinions only below ***
It most certainly won't be built by Intamin - considering their long term safety record (especially recently) and the company's rather negative reputation with Universal (they built the first Jaws ride - nuff said).