Loyalists get everything, even in 30k! :laugh:
Erm, no.
Decided to pop along after recieving the email about it, nice to see some. For those who've not had a look at the video, it contains the rules for Sigismund and Pollux as a teaser; it might not necessarily be true to print, but here you go;
Sigimund; WS7, 4 Wound 2+/4++, Eternal Warrior, I5 (6 on the charge), 4 S6 AP2 Attacks (5 on charge), rerolling failed charge/sweeping advances. If he kills the enemy Warlord in a challenge while he is the warlord, IF player gains a victory point, and all models in Sigismund's army gain +1 to CR scores for THE REST OF THE BATTLE. To help with that, though, while he MUST issue/accept the challenge, while in a Challenge, his attacks have Instant Death AND forces the opponent to reroll invulnerable saves. Anything short of a Primarch or other Legion Champion style character is pretty much instantly dead. He isn't just a stat up either; he actually influences army structure as well; Templar Brethren squads can be taken as troops, AND he provides an Initiative Bonus to his unit on the charge.
He also has IF traits, Adamantium Will, and Fearless. The notes in his ability requiring him to always issue/accept challenges suggest that IF rules are pretty much against challenges.
Pollux; Not sure if it's an editing error, but Pollux has BS4 and S5; maybe it's meant to be the other way around, maybe not, due to his "Hammer Blow" rule; basically, he gets to ignore unwieldly on his powerfist in return for reducing his attacks characteristics to '1' (although he still gets to benefit from bonuses to Attacks, such as charges, etc). His Fist is MC'd though, which makes it slightly more palatable, and with S10 on his fists attack. His ability comes in the ability to change how the army plays, making it more flexible; an Infantry Squad from the IF Legion gets the ability to Deep Strike (from Teleportation if it makes a difference), while he and his unit gets to choose whether to pass or fail their morale checks.
He isn't a massive game changer, but with access to a Vigil Pattern Storm Shield (something different, presumably from the Dragonscale Storm Shield available in the last book which was Salamanders only), and a Combi-Melta, he can be quite a decent "tank" in games that involve murder-hobo's like Sigismund.