Isn't this the IT director's job?
As the name implies, they are there to direct. To strategise, to have the big picture, to know which direction the biz and the IT industry is headed. Most important of all, it's their first duty to be able to communicate the vision-thing to the minions and also to the shareholders.
If a project request doesn't come with director-level sponsorship, so it can be traced back to a corporate strategy somewhere, it's both reasonable and necessary to question its existence.
it's also the IT directors job to stay aware of shifts in high-level directions, innovations and project costs/progress (at least to the nearest million, anyway). So if a project does seem to be mired or directionless, the sooner the IT director grabs it by the 'nads and/or cans it, the better. That's what they're there for - it only takes one email, and it's why they get paid the big bucks.