That would suck so much, and also completely destroy what's left of the narrative. A lot of people may not like Jon Snow, just like a lot of people don't like Dany, but their stories have been built up for 5 books/seasons now, and for Jon to die and not be brought back at
all... it makes no sense. And I'm not a raving Jon Snow fangirl, so I'm not biased in favor of his character at all. It just makes no sense the way D&D have done the narrative not to bring him back.
Let's look at some of the evidence the
show has presented us with:
In the third season, the story deliberately diverts from the books by having Melisandre running into the Brotherhood Without Banners, meeting Thoros of Myr and Beric Dondarrion, showing the audience that no only can Red priests bring back the dead, but they can do it more than once, and that Melisandre is aware of this (although she is initially in disbelief), and Thoros of Myr brought Beric back seemingly with no great sacrifices of King's blood. Beric says Melisandre was sent to them for a reason--I don't believe it was just to collect Gendry and be done with it. I believe it was to show Melisandre that if a drunk like Thoros can raise the dead, so can she. And if she's still juiced up from sacrificing Shireen, it may have unintended side effects.
It may not have seemed important at the time, but I believe the writers gave us those scenes in the third season for a purpose. Unlike in the books, we're not privy to characters inner thoughts, so they have to come up with different ways to make us understand different concepts.
Now, flash forward to Season 5. For whatever reason, instead of having Melisandre, Shireen, and Selyse remain at the Wall, they sped up Stannis's story line, sacrificed Shireen, showed Stannis's defeat, and then, very conveniently, Melisandre shows back up at the wall, looking full of regret and horribly dejected, mere minutes before we see Jon assassinated.
I know people have criticized the some of the writing this season, but this one, small scene was done very deliberately for a reason. Yes, the writers have admitted that Jon Snow is dead, but that never mean that he couldn't come back. They're getting into unexplored territory with the 6th season, so it comes as no surprise that they're making a big secret of everything. Even Kit Harrington telling the world that he won't be coming back makes no fricking sense either. And the fact that he was spotted in Belfast without having his hair cut... Not buying it. Not one bit.