They do.
Forbes ran an article on this, interestingly enough. There's no particular telling what's going on over there. Looks like it's just another piece of abandonware. Oh well.
The petition is silly though. You're petitioning for what, exactly? For the company to force Kojima to work on the project, when the two of them don't seem to
want to produce it together? This is how you get rushed, crappy games: When the relationship between publisher and developer is driven solely by public desire for product, rather than internal desire for product. It's not like they cancelled it for shits and giggles, that's a huge franchise they've just strangled in the crib: There's probably very good reason for it, whether we like it or not, and a petition would neither benefit us or them at this point.
I'm adopting a "wait and see" philosophy, like a wise old sagely ferret. Maybe Konami will do something else with the franchise with Kojima out of the way. Maybe they'll sell the franchise
to Kojima in the future. Maybe this is just the beginning of the end and Konami will crash and burn, and just like X-COM & Homeworld before it, we'll see another company swoop in on the decaying remains of Konami to pick up the Silent Hill franchise. Lots of possibilities, limited information on the present situation. Let Capitalism do its thing, save petitions for things of actual merit that require public outcry or inquiry.