NEXT NOVEL--Where to Begin?

I'm thinking about beginning on the new novel soon, but I have multiple ideas. I'm going to choose one of these. Any feedback welcomed.
Jeff

Working title: RELEASE THE MAROONS
Summary: It's one of the guys who played a teletubby on the BBC series, and his getting involved with a gang of E-cstasy drug dealers. There's also an Eastern European assassin and a love interest who only has one leg. It becomes a kind of road movie book half-way through as the teletubbies go on the run because of a weird millionaire who is searching for his lost daughter, who, unbeknownst to him, has been starring in off-off-Broadway productions of The Crysalis, a play about a woman who wants to become an insect. Then the shit really hits the fan.

Working title: THE SCARS OF DAVID RUBIN
Summary: A scar on televangelist David Rubin's arm from his days in the army begins to obsess him. He names the scar. He begins to talk to the scar. Eventually, he begins to write a memoir about how he got the scar--and this forms the bulk of the novel, which covers the 24-hour period during which the scar incident occurred, and will probably be about 300 pages long, since it covers the period in minute detail. Rubin is searching for some truth or awakening that he can't get from religion, through this examination of the scar and the events surrounding its creation. At the end of the novel, in an ironic scene, he determines that his problems have nothing to do with the scar and that he probably just needs "a lady friend".

Working title: MANDIBLES OF FEAR
Summary: An entomologist becomes obsessed with a research assistant of his and begins to write love poems to her, etched into the carapaces of Rhinoceros Beetles, which he trains to fly in her general direction. When this doesn't work, he sends out hundreds, Leaf Cutter ants, using a complex series of pheromone signals to get them to bring a letter written on a banana leaf to her desk. Due to a competing pheremone trail, the letter is delivered to the wrong woman and she, also an entomologist, begins to send back love letters to the original entomologist, who works in a different research building. Over time, the male entomologist begins to emit his own pheremones, drawing the female entomologist to him. When he sees that she is not the woman he thought he was corresponding with, he tries to get away from her, but she uses a complex series of chemical reactions to bind him to her. At the end of the novel, they are communicating entirely through pheromones and have, in essence, discovered a new kind of language. The original object of the male entomologist's desire, meanwhile, steals all of their research work and publishes it herself, but they don't really care by then.

Working title: THE LARCH OF TIME
Summary: This novel takes place under the leaves of a larch tree, over a period of over 100 years. The main characters, the tragic lovers Edmund Rerache and Tiffany Anglepart, meet there once a year to discuss how they can get out of their doomed marriages, but never manage to do so. Meanwhile, their partners meet under another tree, where their conversations, due to the limited structure of the novel, cannot be heard. Gesticulations are allowed to be represented in the novel. Edmund and Tiffany live for a long, long time, and each time their conversations are more tragic and heartfelt. They come to realize that although, over the 100 years they've known each other, they've only spent 100 days together, it's felt like a lot longer. The last 20 years or so is spent in reminiscence over the past 80 years, with Edmund saying, "Do you remember our larch tree conversation in 2007?" Or Tiffany saying, "You really broke my heart during the larch tree conversation of 2010." Finally, the larch tree is cut down and they meet for the last time, where the stump still stands. They realize their conflict/dilemma cannot be resolved in this lifetime and decide to volunteer for cryo-genic freezing, hopeful that when they wake up their equally long-lived spouses will have kicked the bucket. "Like this larch tree," Edmund says to Tiffany in the stirring last scene, "our love must be cut down to grown again." Then they each take a piece of larch bark and go off to get frozen.