Here's my take. To be a successful company, you have to bring money in, and not pay too much money out. Telltale is not a publicly-traded company, so I don't know how good its balance sheet is, but it has to pay employees, computer support, the Internet bill, licensing fees (because whoever owns Wallace & Gromit probably isn't letting Telltale use their characters for free), and the other kinds of expenses companies generally have to pay for (taxes, the electric bill, coffee...). The good thing about Telltale not being publicly traded is that we don't have stock analysts screaming that nobody's buying anything but the bare necessities, and maybe not even that. Well, OK, we do have the screaming analysts, but they're not screaming about Telltale, so just ignore them.
The summer job market for teenagers is looking grim, because not only will there be fewer jobs than last year, but there are a lot of unemployed adults who are desperate and starting to fight for the same kinds of jobs that teens target. That means there will be more teenagers with nothing to do over the summer. When teenagers are bored and have too much time on their hands, they start to get into trouble. Hear that, parents? Paying reasonable entertainment expenses for your teens now may save you from having to pay a lot more later! And Telltale games are more cost-effective than a lot of alternatives!
There are also still some older folks out there who might remember playing Sam & Max back in the '80s when it was new and supported, and who don't know that Telltale has created some more Sam & Max games. So that's another possible market, with the challenge being how to make them aware that Telltale exists. You can help.

Look for forty-year-olds who might have been adventure game fans back in the day.
Basically, I can't guarantee that the future will be bright for Telltale, but I can say that the opportunity is out there. Telltale has spent a lot of money getting Wallace & Gromit off the ground, so let's hope it's a hit!