The spoiler (via EW) is both good news and tragic news as the season premiere appeared to show a rather bloody ending for Tom Keen, although things in The Blacklist have often not been as they have seemed.
We do know that Tom has a secret regarding Red that he’s been itching to tell Liz, although he hesitated in the premiere when she delivered the news that Red is her biological father.
If marriage is in the future for Tom and Liz, letting her know about the significance of that suitcase will likely put him in his father-in-law’s bad graces, which appears to happen regardless according to that flash forward.