I've only recently begun looking at the Bloodrager in the playtests, but it occurred to me that it would be interesting if they got bloodlines unique to themselves rather than sharing bloodlines with sorcerers. (Perhaps this is the reason one becomes a bloodrager rather than sorcerer?)
It's most likely not going to happen, for various reasons (multiclassing, late in the design phase, etc.), but I still thought it would be fun to brainstorm them.
The alterna-bloodlines I'm considering are these (along with their sorcerous "counterparts" - not all are really counterparts, per se, but the closest "equivalent" I could think of.)
Bloodrager - Sorcerer
Behemoth - Aberrant
Kyton - Abyssal
Titan - Arcane
Agathion - Celestial
Inevitable - Destined
Linnorm - Draconic
Elemental (alternate) - Elemental
Eldest/Tane - Fey
Qlippoth - Infernal
Nightshade - Undead
Speculated bloodline abilities:
Elemental
Elemental bloodragers get their powers from the fusion of different elements. Whether it be the icy cross of air and water, or the fiery mixture of fire and earth, bloodragers of elemental bloodlines are potent fonts of natural fury.
Bloodragers must choose an elemental combination from which they derive their powers: Ice, Lightning, Magma, or Mud.
Bloodline Feats: Great Fortitude, Improved Bullrush, Improved Grapple, Improved Overrun, Lightning Reflexes, Nimble Moves, Power Attack
Bloodline Powers
Elemental Movement: I'd like to see different forms of movement here from the standard. Lightning Stroke- the bloodrager charges as an electrostatic burst, damaging his enemy; Ice Glide- the bloodrager forms an icy sheath on the ground beneath him, sliding along it; Eruption- Mud and Magma bloodragers can fire themselves like a cannon at the enemy.
Elemental Armor: Either the bloodrager can project a damaging aura around themselves of their element (ice, electric, heat, acid), or perhaps even form an AC boosting sheath around themselves composed of their element.
Elemental Grapple: The bloodrager gains a bonus to his grappling attempts due to his associated element. This works particularly well with ice and mud, but lightning and magma might need a different application (burn for magma most likely, and either shocking grasp for lightning or a paralytic effect)
Other possible options I've thought of would include a self-heal effect for mud (based on peloids).
Kyton
I'd like to see these guys have bloodline powers that cause razors and/or chains to erupt from their flesh, to flail opponents. Powers over the blood of their enemies as well.