Yes,They can probably have it ready before that, but you need to test it, and that's pretty time consuming. With some medicines it can take up to 10 years. You might get to a point where you decide to skip the tests, but that has also been known to be fatal, and I don't think nCoV is "dangerous enough" for that. It might change pretty quickly though.
The Institut Pasteur hopes for an experimental vaccine "at the end of next summer".
We will have to wait "the end of next summer" to obtain a vaccine that would be "available for clinical studies", said Frédéric Tangy, professor and director of the vaccine innovation laboratory at the Pasteur Institute.
The vaccine will then have to go through "clinical studies," he added. “At the Institut Pasteur, we use a vaccine platform which is based on the measles vaccine. We must first build the vaccine candidate against the coronavirus virus and then we will test it in animal models. And if it is effective, it will then go into industrial manufacturing. ”